Best time to fly Liverpool to Belfast

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full LPL to BFS record →

Best month

March

94.8% on time · 230 flights

Worst month

January

75.5% on time · 204 flights

Month Flights On time Cancelled When late, by
January 204 75.5% 3.92% 0 min
February 204 92.6% 0% 0 min
March 230 94.8% 0% 0 min
April 232 93.1% 0% 0 min
May 230 85.2% 0% 0 min
June 425 79.4% 0.71% 0 min

What a seasonal pattern can and cannot tell you

Months differ for reasons that repeat — summer thunderstorms in the American interior, winter fog and de-icing in northern Europe, school holidays filling every seat and leaving no slack in the schedule. Those are real and they come back each year.

What the pattern cannot do is forecast a particular flight. A quiet month has late days and a bad month has punctual ones. Treat this as a way to choose between two dates you are indifferent about, not as a promise.